package com.kai.interceptor;

import com.kai.JwtUtil.JwtUtil;
import com.kai.constant.UserConstant;
import com.kai.properties.JwtTokenProperties;
import com.kai.threadlocal.BaseContest;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

@Slf4j
@Component
public class ExpressPickUpServerInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtTokenProperties jwtProperties;
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }
        log.info("拦截到请求：{}", request.getRequestURI());
        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getTokenName());

        if (token == null) {
            log.info("请求头中不存在token");
            //提示用户登录
            response.setStatus(401);
            return false;
        }

        //2、校验令牌
        try {
            log.info("jwt校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getSecretKey(), token);

            //在每次请求的线程中 加入userId
            Long userId = Long.valueOf(claims.get(UserConstant.USER_ID).toString());
            log.info("当前员工id {}", userId);
            BaseContest.setCurrentId(userId);

            //3、通过，放行
            return true;
        } catch (Exception ex) {
            //4、不通过，响应401状态码
            response.setStatus(401);
            return false;
        }
    }



}
